Questions tagged [inductive]

In the context of electronics, inductive refers to circuits that use magnetic fields, for things such as power or data transfer or sensing metal objects

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Inductive or capacitive load?

Here I have a series LCR circuit with resonant frequency greater than 200Hz. Is there a way to know whether this circuit is an inductive or a capacitive load? Edit: The only additional information we ...
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How does balancing currents within a cable or conduit cancel its magnetic fields?

I know the NEC requires all current carrying conductors of the same circuit to be included in the same cable or conduit [300.3(B)], but why? I think it is because the magnetic field generated by ...
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How can the induced voltage be proportional to the frequency?

According to Faraday's Law, in coupled inductors, the magnitude of the induced voltage at the secondary coil is proportional to primary power source's frequency (V2 = w x I1 x M). On the other hand, ...
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Why does the quality factor include 2*pi?

The quality factor is defined as the ratio of stored energy and dissipated energy (see below). The formula includes \$2\pi\$ as a constant coefficient. Why do we need \$2\pi\$ to calculate the stored ...
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Antenna inductance calculation (RFID applications, inductive coupling)

Inductance of various antenna coils of different shapes can be estimated. Some examples are: A circular coil with single turn. N turn multilayer circular coil. Spiral coil. N turn squae loop coil. ...
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Why inductive load heats up on modified sine wave inverter?

What makes the inductive load like a motor heat up when used on a modified sine wave inverter. Is it because of the back emf caused by sudden drop of voltage by the square wave?
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Can inductive sensors work on anodized aluminum?

I was wondering if an industrial-grade inductive sensor can detect an anodized aluminum plate. From what I know, based on the working principle of these sensors (basically the metal is detected by its ...
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Are SSR Relays suitable for inductive and capacitive loads?

I want to knowingly buy a cheap knockoff SSR Realy from some online sellers. The SSR Relay is advertised as not to be used for inductive or capacitive loads. My application is switching on or off a ...
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Reading the RPM with a two pin car inductive sensor and an Arduino

I would like to read the RPM of an old car using my Arduino Nano. The car has an inductive RPM sensor with two pins, located close to a cogwheel. I am not very expert on this type of sensor. With the ...
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Does current flow from earth connected conductor in uniform electric field?

If we place a conductor inside of uniform external electric field then opposite charges will get induced on the both sides of conductor. What if we connect two earth wire to each side, will continuous ...
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Triac driving motor with limit switch, needs protection?

I'm trying to drive a bunch of motorized ball valves from an ESP32. These valves have a 230V AC motor with one common wire, and two wires to set direction (open/close). When powered between common and ...
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Generation of electrostatic induction

I need to generate a 500 volt electrostatic charge. How can I do this? I don't have a Van de Graaff generator. What are some practical suggestions? Basically I want to do an experiment in which I need ...
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TRIAC control of inductive load. Current ringing at higher power causes TRIAC to remain on

Here is the circuit I am using to control the motor. L2 is meant to represent the motor and C3 is the capacitor that comes with the motor. It is a single phase AC motor found here. This circuit is ...
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Manchester and NRZ coding schemes

How does NRZ recover the clock? For example, Manchester coding is a self-time scheme, but we still need to have DLL or PLL for the recovery, it can be done without those CDR circuits? and back to NRZ, ...
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How to communicate short-distance (under sea) using induction?

I need a bite-throttle on my scuba-regulator to wirelessly control my foot-mounted thrusters, which are about 1.5meters distant from my transmitter. I need only "1 bit" (on or off) right ...
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MOSFET body diode and inductive load

I want to open a solenoid electromagnetic lock using an IRFR024NPbF MOSFET. Datasheet: https://datasheet.lcsc.com/lcsc/1809062114_Infineon-Technologies-IRFR024NTRPBF_C2583.pdf Generally speaking, I do ...
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Split core vs. ring ferrite

I have an Arduino clone with L298P motor driver, which drives a linear actuator with a brushed DC motor and a built-in end of stroke mechanical switches and diodes. Motor runs at about 12V/2A DC, on/...
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PCB antenna: ground plane layers and dimensions (2)?

This question - sequel of PCB antenna: ground plane layers and dimensions?, talking about an IFA: The only dimension that really matters is the length/width of the ground plane, or parallel to the ...
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Uneven Brightness Curve When Using Digital Triac Dimmer on Neon Transformer

I am working on an AC dimmer project using the following circuit: This circuit functions by detecting zero crossings in the AC power input via the LTV814 optocoupler connected to a pull-up input pin ...
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Resonant Transformer / Resonant Inductive Coupling

I´m trying to build a resonant transformer (or a resonant inductive coupler, I don´t know if the names fit to the topology I´m showing, anyway). The idea is to develop a high voltage on a capacitor. ...
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Could anyone identify the manufacturer or a similar product to this ~6x7mm inductive charging coil?

I had this smart ring from a company called Oura, and I took my charger apart recently. Inside, I found an incredibly small inductive charging coil printed inside of a little FPC. Could anyone ...
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Can someone explain the dependence of coupling coefficient to inductance value to me? It seems counter intuitive

According to the formula \$K=M/\sqrt{L_1 L_2}\$, it seems that k is inversely proportional to the inductance values of the two coils. However, it seems to me that a coupling between two 2uH inductor ...
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Can I connect Inductive Proximity sensor to two different input PLCs

Please, I´d like to know if I can connect a inductive proximity (PNP output) sensor in 2 PLCs inputs like the example in the image attached?
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How to pass a signal over isolator with only one side powered?

I have a system composed of a 230VAC zone isolated from a human contact zone with a 7.5mm 2k5 space. On the human side there is a dry contact switch: I am searching for a less than 1€ solution to ...
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Schottky+Capacitor as flyback (snubber) diode

Since de-charged caps momentary act as short circuits, why not use schottky+capacitor (in series), as flywheel solution? don't they (at least theoretically) store fast energy transitions happening ...
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Designing a 100 W 150 kHz sine wave oscillator

Problem: I need to design an oscillator that is capable of producing a sine wave at 150 kHz using 100 W (50 V and 2 A). This signal will be used to drive a pretty heft induction coil for resonant ...
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What is the difference between capacitative and inductive coupling in a twisted pair?

I'm learning about networking and there is this passage: "Twisting cancels out inductive coupling, while the shield eliminates capacitive coupling." What kind of effects are these, ...
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Trying to Understand How Honda Ignition Timing Works

So, I know this isn't an automotive group (per say), but I think that is exactly what I need. In the most simple terms, I've been dissecting my 2001 Honda Accord (3.0 V6 for what it's worth) to ...
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What device has high inductance? For example >1000mH (for 220Vrms 50-60Hz output) [duplicate]

What devices have high inductance values (for example >1000mH?) What I found in a real device (for example induction motor) datasheet is just near <1000mH (on rotor and stator.) Is there ...
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Inductive Crankshaft Sensor Operation

I would like any possible explanations/diagrams of how the waveform voltage rises at the point where the missing tooth/teeth of the reluctor wheel approach and pass the Inductive Sensor. This is just ...
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Solid State Relay for Large Inductive Load

I have an old, transformer-based welding machine, which is rated to draw about 70A at 240V, at full output. It uses an electro-mechanical relay (contactor) to energize the main power transformer, and ...
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Finding the kVA loading after improving the power factor

This is a homework question I've been attempting. But the answer I get doesn't match with whats given and I don't understand why my method is wrong. This is the question with answers. Here's what I'...
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Only some of my inductive sensors are working with my board

I am working on a board which has six inductive sensors. I am using optocouplers for isolation between sensor output and MCU. Four of them work fine and two show very unreliable behaviour. When I ...
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Grounding Ignition Coil Using IGBT ckt....Not Working + Can't Understand?

I am a hobbyst, and recently been working on a small project of my own, Creating a rev limiter of my own. Following is my circuit which will explain a lot about what I am trying to do. First of all ...
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4 answers
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Intuitive way of "visualizing" how the energy is stored in an inductor?

I've been trying to more or less understand intuitively how energy is stored in an inductor, but I don't seem to get anywhere decent. In a capacitor I understand, I believe: an external battery pushes ...
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Does turning on inductive load (ex. AC motor) at peak input voltage reduce inrush current?

I was checking out the following project on hackster and at some point the author claims that When the load is predominantly of inductive type, the turn-on is performed at the peak of the input ...
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How can I increase inductive spike voltage?

I would like to know how I can increase the maximum voltage of inductive spikes. I’m investigating their use in electrolysis - the bigger the spike the better. To create the spikes, I’m using an ...
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2 votes
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Why is an inductive load not desirable for a GTO circuit?

I was wondering why is an inductive load not good for a GTO circuit from a power electronics perspective.
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36V inductive charging coil or multiple coils

I want to charge a 36V lithium battery using an inductive charging setup, input 36V and output 36V. Currently I am charging at 2 amps, so along those lines. I can only find coils online that work up ...
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1 vote
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Can you have "directional" wireless power transmission (to power an LED)

I've tried to research this, but the only circuit examples I can find use an "oscillating field". I have a project where I would like to put two differently colored LEDs in an object, and ...
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Low Power Toroidal Conductivity Sensor Inconsistent Values

I have been trying to build a low power toroidal liquid conductivity sensor using the principle given in this image. This link has more information about the principle behind the sensor. What I have ...
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Zero cross control for inductive loads

Is zero cross control acceptable for small motors? I know it is bad to have voltage and current out of phase for inductive loads but wanted to know if it would not be harmful to small motors (< 500 ...
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Relays for switching circuilation pumps

I have a board populated with Omron relays (G5Q-1A4-EU DC5) and I want to use them to switch circulation pumps (https://imp-pumps.com/pumps/ghn/). Is the previous relay appropriate to be used with ...
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What can I use to switch a 500mA 12v inductive load from 3.3v Output

I have a ESP8266 that needs to switch a water valve that draws 500mA on 12V. What can I use to switch that load? Right now I think I will use a logic level Mosfet but I am a bit lost with choosing the ...
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Why are high frequency signals not disturbed by stray fields?

I am trying to design an inductive position sensor based on a high-frequency signal. It is mentioned that using high-frequency signals gives immunity towards stray magnetic fields. Could anyone ...
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In Inductive Position Sensor the air gap between the metal target and coil changes the position value?

I am trying to design the inductive position sensor with the inductive sensor IC ZMID5201. I am trying to optimize the air gap betweeen sensor coil and metal target. As per the datasheet its ...
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ISO 7637 Supply Transient pulses - Explanation

I am trying to design an input power supply filter circuit inorder to protect from ISO 7637 pulses. I am referring this Little fuse app note There seem to be different pulses. Pulse 1, 2a, 2b and so ...
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Protective measure against powering inductive loads

From various chip manufacturer articles and other post in this site, I still have doubts on my circuit for switching inductive loads. I have two setup here that both switches an inductive but using ...
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Determining direction from an inductive joystick

I'm trying to understand and (eventually) repurpose an old inductive joystick, but I'm not sure how the micro controller determines which direction the stick was pushed in? There are 4 coils on the ...
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Snubber circuit to protect SCR/Diode

In my circuit I need to discharge a capacitor into an inductive load using SCR. In order to make the circuit oscillate there'll be a diode antiparallel with the SCR, as you can see in the picture. My ...
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